Journal of thermal biology最新文献

{"title":"Investigation of the differences in bed microclimate and thermal comfort between school-aged children and adults during sleep onset latency","authors":"Ying Ke ,&nbsp;Qin Zhou ,&nbsp;Qing Zheng","doi":"10.1016/j.jtherbio.2025.104061","DOIUrl":"10.1016/j.jtherbio.2025.104061","url":null,"abstract":"<div><div>The thermal comfort experienced during sleep onset latency (SOL) significantly influences overall sleep quality. While most previous studies have primarily focused on thermal comfort during actual sleep, this study aims to investigate and compare the bed microclimate and thermal comfort during SOL in school-aged children and adults, taking into account their differing physiological characteristics and thermal preferences under various sleep thermal conditions. Fourteen school-aged children and fourteen adults participated in two experiments conducted under winter conditions (8 °C and 11 °C), as well as two experiments under transitional conditions (21 °C and 24 °C). Each experiment lasted 60 min, with continuous monitoring of skin temperatures and bed microclimate throughout the duration. Subjective assessments of thermal perception were collected after each experiment. The experimental results indicate that the difference in skin temperature (T_sk) between school-aged children and adult subjects is more pronounced under winter conditions, underscoring the importance of considering age-related differences when designing optimal sleep thermal environments, particularly during colder months. The comfortable range for T_sk among school-aged children is identified as 34.4–35.4 °C, while for adults it is slightly narrower at 34.3–35.0 °C. Additionally, the comfortable range for bed temperature (T_bed) is found to be between 30.8 and 33.8 °C for school-aged children compared to a range of 31.0–33.2 °C for adults. Furthermore, it was observed that the comfort range of T_sk is approximately 0.4–1.3 °C higher in the sleep environment than in the active daytime environment. These findings provide valuable insights that can inform the design of effective thermal environments aimed at enhancing SOL in both children and adults, thereby contributing to reduced economic costs while improving energy efficiency.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104061"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143365193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraspecific interactions and thermal refuge availability interactively influence ectotherm thermoregulation but not energy dynamics","authors":"David R. Adams,&nbsp;Matthew E. Gifford","doi":"10.1016/j.jtherbio.2025.104052","DOIUrl":"10.1016/j.jtherbio.2025.104052","url":null,"abstract":"<div><div>As climate change poses increasing challenges to ectotherm fitness through changes in the availability of suitable thermal habitats, understanding the interplay between behavioral thermoregulation and microhabitat availability is crucial. We employed a spatially explicit, individual-based model to investigate the effects of refuge density and social interactions on ectotherm thermoregulation using the Eastern Collared Lizard (<em>Crotaphytus collaris</em>) as a model. Both limited refuge availability and territoriality substantially impaired thermoregulation, especially for smaller, subordinate individuals that experienced temperature-induced mortality at high frequencies. Size-dependent mortality from exposure to lethal temperatures may have important consequences for population demography or social structure. Metabolic costs were primarily associated with high body temperatures rather than costs of locomotion. However, net energy assimilation was invariant to competition or refuge density. These findings emphasize the need for ecological models to incorporate complexities of natural environments, including social interactions, to accurately predict responses of ectotherm populations to environmental change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104052"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143315550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lactobacillus plantarum 4-2 alleviates cyclic heat stress-induced oxidative stress and damage in the ileum of laying hens via Keap1-Nrf2 pathway","authors":"Laizhi Xu ,&nbsp;Peichao Gao ,&nbsp;Huixian Wu,&nbsp;Yixin Gao,&nbsp;Helong Ji,&nbsp;Xi Huang,&nbsp;Shuo Zhang,&nbsp;Wentao Fan,&nbsp;Suquan Song","doi":"10.1016/j.jtherbio.2025.104072","DOIUrl":"10.1016/j.jtherbio.2025.104072","url":null,"abstract":"<div><div>The frequency and severity of heat stress in livestock production are increasing due to intensive farming practices and rising global temperatures. Due to the lack of sweat glands, poultry are highly susceptible to heat stress, especially in the intestinal tract. Therefore, it is crucial to find environmentally friendly, safe, and effective methods to alleviate heat stress. Probiotics have often been used to mitigate intestinal damage and maintain intestinal function. In this study, the efficacy and mechanism of action of <em>Lactobacillus plantarum</em> 4-2 on oxidative damage and inflammation induced by cyclic heat stress in laying hens were investigated. The results showed that addition of <em>Lactobacillus plantarum</em> 4-2 (≥1 × 10⁹ CFU/day/bird) significantly enhanced growth performance and improved the antioxidant capacity of the organism in cyclic heat-stressed laying hens. Meanwhile, ileum barrier damage was alleviated, expressions of intestinal tight junction proteins were elevated, and cyclic heat stress-induced decreases in ileum villus height and villus/crypt were ameliorated. Supplementation with <em>Lactobacillus plantarum</em> 4-2 resulted in a significant decrease in the expression of <em>Ifn-γ</em> and <em>Il-6</em> and an increase in <em>Il-10</em> and <em>Tgf-β1</em>, which attenuated the disruption of the ileum barrier and inflammatory damage by cyclic heat stress. Furthermore, <em>Lactobacillus plantarum</em> 4-2 decreased the level of Keap1 and increased the levels of Nrf2, NQO1, and HO-1, thereby alleviating cyclic heat stress-induced ileum oxidative stress. These results indicated that <em>Lactobacillus plantarum</em> 4-2 could enhance the antioxidant function, alleviate oxidative stress, and reduce ileum damage via Keap1-Nrf2 signaling pathway.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104072"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143316871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surviving the heat: The homeostatic regulation mechanism of endangered Brachymystax tsinlingensis","authors":"Zhenlu Wang ,&nbsp;Huan Ye ,&nbsp;Peng Liu ,&nbsp;Shaoqing Lin ,&nbsp;Yizhou Wang ,&nbsp;Qiong Zhou ,&nbsp;Haibo Jiang ,&nbsp;Jian Shao","doi":"10.1016/j.jtherbio.2024.104023","DOIUrl":"10.1016/j.jtherbio.2024.104023","url":null,"abstract":"<div><div>Conservation and utilization of <em>Brachymystax tsinlingensis</em> Li, 1966 (<em>B. tsinlingensis</em>), an endangered cold-water fish, is severely hampered by heat stress. In this study, heat stress and recovery experiments were firstly performed and implied that the intestine of <em>B. tsinlingensis</em> remained capable of self-regulation under heat stress. Therefore, transcriptome analysis was used to investigate the homeostatic mechanisms of <em>B. tsinlingensis</em> during temperature fluctuations. The results showed that a total of 5775 differentially expressed genes (DEGs) (1725 up- and 4050 down-regulated) were identified in the heat stress group, and 4312 DEGs (2024 up- and 2228 down-regulated) were identified in the recovery group when compared to their expression levels in the control group. Through Gene Set Enrichment Analysis (GSEA), citrate cycle (TCA cycle), oxidative phosphorylation, apoptosis, ferroptosis, focal adhesion, and tight junction pathways were found to be significantly up-regulated during heat stress, and declined during the recovery process. The results illustrated that heat stress caused ferroptosis and apoptosis in <em>B. tsinlingensis</em>. However, the organism was able to maintain homeostasis during temperature fluctuations modulating its energy metabolism, as well as the barrier and immune functions of the intestine. These findings help to enhance our understanding of the acclimation mechanisms of cold-water fish in present-day climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104023"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142828759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single and combined effects of environmental heat stress and physical exercise on thermoregulation, executive function, and cerebral oxygenation","authors":"Fanjun Qin,&nbsp;Ke Hu,&nbsp;Yuge Wu,&nbsp;Xinyan Zheng","doi":"10.1016/j.jtherbio.2025.104057","DOIUrl":"10.1016/j.jtherbio.2025.104057","url":null,"abstract":"<div><div>This study investigated the single and combined effects of environmental heat stress and physical exercise on executive function (EF) performance, prefrontal cortex oxygenation, thermoregulatory responses and subjective perceptions. Sixteen subjects participated in four experimental sessions: two under moderate environmental conditions (23 °C), with and without physical exercise (R23, E23), and two under hot environmental conditions (35 °C), with and without physical exercise (R35, E35). In each session, participants completed EF tasks before and after 1 h of passive rest or 45 min of moderate-intensity cycling followed by 15 min of rest. We used Δresponse time (ΔRT) and Δaccuracy (ΔACC) of EF tasks to demonstrate changes from pre to post experiment. Additionally, changes in cerebral oxygenation during EF tasks were illustrated using the Δoxygenation difference. Heat stress alone increased core temperature (T_core), mean skin temperature (T_skin), heart rate (HR), thermal sensation (TS), and rating of perceived exertion (RPE). Exercise in a hot environment further increased physiological indicators and RPE, but TS exhibited a different pattern, with lower TS in R35 compared to E35 during the second battery of executive function tests. Moreover, heat stress alone increased ΔRT for the More-Odd Shifting task and the Stroop task under incongruent conditions, while decreasing the Δoxygenation difference during the More-Odd Shifting task. ΔRT for the 2-back, More-Odd Shifting and Stroop tasks under incongruent conditions were lower in the E35 trial than in the R35 trial, whereas the Δoxygenation difference was higher in the E35 trial compared to the R35 trial. These findings indicate that environmental heat stress alone increases T_core and T_skin, alters TS, and impairs EF performance by decreasing prefrontal cortex oxygenation. A 45-min moderate-intensity exercise combined with environmental heat stress enhances the increases in body temperatures but mitigates the detrimental effects of heat stress alone on EF performance by increasing prefrontal cortex oxygenation.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104057"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143052957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between temperature and relative humidity with CO2 and CH4 concentration and ectoparasite abundance in blue tit (Cyanistes caeruleus) nests","authors":"Francisco Castaño-Vázquez ,&nbsp;Sergio Sánchez-Moral ,&nbsp;Soledad Cuezva ,&nbsp;Santiago Merino","doi":"10.1016/j.jtherbio.2025.104058","DOIUrl":"10.1016/j.jtherbio.2025.104058","url":null,"abstract":"<div><div>The presence of nestlings influences the microclimate inside avian nesting cavities. We explored the relationship between temperature and relative humidity and the abundance of ectoparasites and gas concentrations in blue tit nest boxes during the nestling period by comparing two years with differing climatic conditions. In the second year, we also manipulated the temperature and humidity inside the nest boxes. The average temperature in nest boxes was colder during 2016 than 2017; in the latter, even warmer conditions were attained due to the experimental manipulation of temperature. Carbon dioxide (CO₂) concentration in the forest air was slightly lower in 2016 than 2017. However, in both years, the CO₂ concentration of nest box air was higher than that of forest air, with 2017 showing a greater difference. Differences in brood size, larger in 2016, did not explain the difference in CO₂ concentration. However, CO₂ concentration was higher in nestboxes in the warmer year implying that at higher temperatures, organic matter decomposition likely accelerates, releasing more CO₂ into the atmosphere. By contrast, CH₄ concentration in nest-box air, which was similar in both years, was lower than that in forest air, particularly in the wettest and coldest year. Different relationships were found between the abundance of different ectoparasites and the temperature, relative humidity, and gas concentration measured at different days of nestling age. For example, a positive association is observed between flea larval abundance and temperature at nestling day 8, but a negative one is observed for mites under the same microclimate conditions. Moreover, a negative relationship was observed between the abundance of mites, midges, and blackflies and CH₄ concentration at different nestling ages. These results suggest that changes in climatic conditions can also affect the concentrations of CH₄ and CO₂ inside and outside nest boxes, which in turn differentially affect ectoparasite abundance.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104058"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EDITORIAL: Thermoregulatory and metabolic adaptations in a changing world","authors":"Julia Nowack ,&nbsp;Katie Marshall ,&nbsp;Jérémy Terrien ,&nbsp;Sylvain Giroud","doi":"10.1016/j.jtherbio.2025.104062","DOIUrl":"10.1016/j.jtherbio.2025.104062","url":null,"abstract":"","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104062"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comfort-based design of summer green space optimization in arid oasis-type cities","authors":"Hongkai Xie,&nbsp;Xiaoxu Li,&nbsp;Jie Li","doi":"10.1016/j.jtherbio.2024.104020","DOIUrl":"10.1016/j.jtherbio.2024.104020","url":null,"abstract":"<div><div>Arid, oasis-type cities significantly limit the quality and duration of outdoor activities for residents due to their hot, dry summer climate. This study aims to enhance environmental comfort in dry, hot regions, focusing on the outdoor environment of a densely populated university in Xinjiang. Through on-site research and field measurements, the thermal baseline and key factors influencing comfort across different times and locations were analyzed. Numerical simulations were employed to explore the mechanisms by which changes in vegetation parameters affect comfort, leading to the proposal of an optimization strategy. The results indicate that a combination of empirical measurements and survey data reveals variations in thermal baselines and comfort-affecting factors over time and space. The neutral temperature ranged from 26.10 °C to 26.96 °C. Key factors affecting summer comfort included G (0.91∗∗), T_a (0.74∗∗), and RH (−0.57∗∗). The impact of vegetation coverage on PET was found to depend on the type of vegetation assembly. In comparison to the baseline case at 18:00, the optimized plaza design resulted in a decrease in T_a, etc by 2.86 °C, an increase in RH by 3.42%, a reduction in V_a by 0.01 m/s, and a reduction in PET by 24.62 °C. These enhancements also improved comfort levels on nearby roads. The findings provide valuable insights for assessing human comfort and designing green spaces in arid regions.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104020"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the physiological benefits of behavioral flexibility in chacma baboons (Papio ursinus) using a biophysical model","authors":"Christine D. Grebe ,&nbsp;Paul D. Mathewson ,&nbsp;Warren P. Porter ,&nbsp;Richard McFarland","doi":"10.1016/j.jtherbio.2024.104042","DOIUrl":"10.1016/j.jtherbio.2024.104042","url":null,"abstract":"<div><div>As opportunistic generalists occupying a range of ecological niches, chacma baboons (<em>Papio ursinus</em>) are considered a highly flexible species of relatively low conservation priority. Underlying their ecological flexibility is a repertoire of behavioral strategies observed in response to ecological stressors. Although these strategies are relatively well-documented, we know very little about how they impact upon an individual’s thermal and energetic physiology, which can influence population-level reproductive potential in the face of climatic warming. Here, we used Niche Mapper™ to construct a biophysical model that integrates morphometric, autonomic, and behavioral inputs to predict the core body temperature of chacma baboons in response to varied microclimate conditions. The predictive integrity of the model was confirmed by comparing model outputs with the core body temperature of a free-living chacma baboon equipped with an intra-abdominal temperature-sensitive data logger. When behavioral thermoregulation was incorporated, our model predicted body temperature within 1.5 °C of the observed temperature for 94% of hours. Of the tested behavioral thermoregulatory responses, shade-seeking provided the greatest thermal benefit, reducing predicted core body temperature by an average of 0.9 °C during daytime hours. Evaporative heat-dissipation strategies (sweating or swimming) were also highly effective in circumventing hyperthermia in our modeled individual, with an average body temperature reduction of 0.6 °C. Our findings underscore the critical importance of behavioral thermoregulatory strategies coupled with access to essential microhabitat features, water and shade, to achieve homeothermy in a warming climate.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104042"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142971582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of warm carbon dioxide insufflation vs. local heat on shoulder pain in laparoscopic cholecystectomy: A randomized clinical trial","authors":"Saeideh Vaziri Kordestani ,&nbsp;Ebrahim Nasiri-Formi ,&nbsp;Mohammad Davood Qane ,&nbsp;Elmira Khodabakhsh","doi":"10.1016/j.jtherbio.2024.104041","DOIUrl":"10.1016/j.jtherbio.2024.104041","url":null,"abstract":"<div><h3>Objective</h3><div>Laparoscopic cholecystectomy is a common procedure for gallbladder diseases, but many patients experience shoulder pain due to pneumoperitoneum. This study investigates the comparative effectiveness of warm carbon dioxide gas insufflation versus local heat application in reducing shoulder pain after laparoscopic cholecystectomy. We also examined changes in body temperature during surgery and postoperative shivering in the intervention and control groups.</div></div><div><h3>Methods</h3><div>93 patients undergoing elective laparoscopic cholecystectomy were divided into three groups: Group A: Warm carbon dioxide gas, Group B: Local heat, Group C: Control. Patients' body temperature, shivering, and right/left shoulder pain were evaluated. Data was analyzed using SPSS software with a significance level of 0.05 and GEE regression.</div></div><div><h3>Results</h3><div>Mean right shoulder pain scores at 48 h and mean left shoulder pain scores at 24/48 h post-operation were significantly lower in the intervention groups compared to control (p &lt; 0.05). There were differences in temperature body during surgery among the study groups. The mean body temperature was 0.48 units higher in Group B compared to the control group. Group A had a 0.14-unit lower temperature than the control group, although this difference was not statistically significant. No significant difference in postoperative shivering was observed among the groups.</div></div><div><h3>Conclusion</h3><div>Based on the findings of this study, Methods of warm carbon dioxide gas insufflation and local heating in laparoscopic cholecystectomy reduce shoulder pain in patients during the postoperative phase. The local heating method significantly increased the patients' body temperature compared to the other two groups, and shivering was similar across all three groups.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104041"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}